Emergency-bolt.



A. A. PAGE.

EMERGENCY BOLT. APPLICATION FILED JULY 10, 1911.

1,094,677, Patented Apr. 28, 1914.

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EMERGENCY BOLT.

APPLICATION FILED JULY 10, 1911.

Patented Apr. 28, 1914.

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UMBIA PLANOGRAPH CO.,WASHINOTON n c A. A. PAGE.

EMERGENCY BOLT.

APPLICATION :ILEIJ JULY 10, 1911.

1,094,677. Patent ed Apr.28, 1914.

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nan STA ATE ALBERT A. PAGE, OF EAST HAVEN, CCNNECTICUT, ASSIG-NOR TO SARGEN'I & COMPANY, CF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

EMERGENCY-BOLT.

esions.

To all whom. it may concern:

Be it known that I, ALBERT A. PAGE, of the town of East Haven, county of New Haven, and State of Connecticut, have invented new and useful Improvements in Emergency-Bolts, of which the following is a full, clear, and exact description when taken in connection with the accompanying drawings, which form a part thereof.

This invention relates to emergency bolt mechanisms such as used in the doors of theaters, school houses and similar buildings, for the purpose of locking such doors securely against entrance from the outside but permitting the easy opening of the doors from the inside in case of a panic resulting from fire or other cause.

The object of the invention is to provide a device of this kind in which the latch bolt or bolts are operated by an operating memher which lies close to the door without extending appreciably into the room, but which can nevertheless, be actuated in an especially easy manner by a slight push in the direction of the door.

To this and other ends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

Referring to the drawings, Figure 1 represents a front elevation of a device embodying the invention, which is shown placed on the inside of a door adapted to swing outward, Fig. 2, a similar view of the device with the bolts shown retracted, Fig. 3, a rear view of the lock and one of the bolts in its protracted position, with cap plate removed, Fig. a, a similar view with the bolt shown in its retracted position, Fig. 5, a rear enlarged view of the interior of the lock, the bell crank levers having been removed, Fig. 6, a transverse section on line 66 of Fig. 5, Fig. 7, a reverse view of one of the bell crank levers, Fig. 8, a transverse section on line 8-8 of Fig. 6, Fig. 9, an edge view of one of the bell crank levers, and Figs. 10 and 11, plan and edge views, respectively, of the bell crank actuating member.

In all figures, similar letters of reference represent like parts.

the drawings, A represents the door, and B the casing to which the door is se cured so as to swing outwardly. 611 the inside of the door, the lock casing G is secured having an actuating handle or lever D of such size that it will be likely to be struck by anyone pushed against the in- Specification of Letters Patent.

Application filed .Tn1y 10, 1911.

Patented Apr. 28, 1914.

Serial No. 637,637.

terior of the door A. The lever 1) extends parallel to the flat surface of the door and is adapted to move in a horizontal plane perpendicular to the plane of the door. The handle or push portion of the lever proj sets but slightly beyond the face of the door so that there will be no likelihood of operating the lever except by a direct push against the same due to the pressure of a crowd. The lever D is provided at its inner end with a latch bolt controlling arm E formed integrally with the outside push portion of the lever. The lever has a vertical pintle F pivotally mounted in bearings carried by a cap plate G which is secured to the casing C. The arm E passes into a casing through a slot H formed in the cap plate and enters an opposite slot I formed in the base of the casing in which slots the inwardly projecting arm of the lever has a limited range of movement.

Mounted within the casing and held slidingly in place therein by means of horizontal pins J projecting from the cap plate is a slide yoke K having a central slot L, through which said pins project, and having an inner straight wall M adapted to bear against the rear wall of the casing when the slide yoke is in inoperative position. The front portion N of this yoke is provided with an outwardly projecting lug 0 against which the lever arm E is adapted to bear for the purpose of moving said slide member inwardly to actuate the latch bolt, as hereinafter de scribed.

Pivotally mounted separately on the pins J are bell crank levers P and Q, each having a rearwardly extending arm R, from which projects at the end thereof a pin S adapted to bear against a shoulder T of the slide bar. The outer end of the bell crank lever has a forked end U which loosely engages a pin V projecting horizontally from sliding bars W. Two of these sliding bars are provided, one projecting through the lower part of the casing and the other through the upper part, and they are slidingly guided within ribs X projecting from the base of the casing. To each of these sliding bars is secured, preferably by means of screw threads a shank X of a latch bolt Y adapted to project vertically from the upper and lower edges of the door, respectively, and engage keepers mounted in the door casing at the upper and lower parts thereof. Springs Y pressing against the shoulders Z of the sliding bars serve to hold said bars and the latch bolts normally protracted, and the other ends of the springs bear against suitable projections rising from the base of the casing.

The latch bolt projects thr ugh a suitable housin A at the edge portion of the door. be head of the latch bolt is preferably provided with an elongated central slot B within which is held a coiled spring C bearing at one end against the inner wall of the slot, and at its other end against a suitable stud D projecting from the housing. The springs C are auxiliary to the springs Y and urge the respective latch bolts in the same direction as said latter springs.

The operation of the device is as follows: ln the event of a panic and a consequent rush of a crowd toward the door the flat push handle of the lever will be pushed against and the lever rocked on its pivot, thus carrying the arm E of the lever outwardly against the slide yoke K and the shoulders Cl will. be carried against the pins J of the bell crank levers, thus rocking the said levers on their pivots and causing them to retract inwardly the bars Tr to which are attached the shanks of the latch bolts, thus withdrawing the latch bolts and unlatching the door and permitting the same to liy open under the pressure of the crowd.

The construction described has the advantage that the operating lever is carried by the casing containing the retracting mechanism for the latch bolts instead of being mounted on the door. Hence the applica tion of the mechanism to the door and its re-- moval therefrom, is considerably facilitated. iiloreovcr, by the construction described I am enabled to use a comparatively shortoperating lever supported solely by the latch mechanism and projecting only part way across the door, inasmuch as the extensive flat surface of the head of the operating lever will make said lever operable even by persons on vded against the door without any intent of attempting to actuate the lever by direct manipulation. The enlarged flat head of the operating lever, lying close to the door, in a plane parallel to the latter, makes the door readily openable in the manner stated, and yet said lever is so placed as to be out of the way under ordinary conditions and to prevent the accidental opening of the door from the inside. I have found it advantageous to extend the operating lever to that side of the casing which is opposite the free edge of the door, for this an rangement brings the operating head of the lever eou'iparativ-ely close to the center of the door, where it is operable with maximum facility in the event of a panic.

Having thus described my invention, what I claim and desire to secure by Letters Patent, 1s 1- 1. ln emergency bolt mechanism I01 doors, the combination of a casing applied to the door near the free side edge thereof, bolt retracting mechanism in said casing, a bolt arranged for retraction by said retracting mechanism, an operating lever for said retracting mechanism located for the most part at the exterior of said casing, and having a part extending into the casing to actuate said retracting mechanism, and means pivoting said lever to said. asing to move in a horizontal plane, the outer or free end of said lever being extended away from and beyond the casing in a direction away from the side edge of the door, and toward the center of the latter, said free end of the lever presenting a subs ntially flat enlargement or head of extended area disposed at the side of the casing and close to the face of the door, approximately parallel with the door, and movable still closer to the door as the bolt is retracted by said lever; substantially as descril ed.

2. ln emergency bolt mechanism for doors, a belt, a casing, a slide movable laterally in said casing parallel to the plane of the door, a bell crank lever in the casing rocked by the movement of said slide, a pivoted opcrating lever for the slide, and means connecting said bell crank lever with the bolt; substantially as described.

3. in emergency boltmerhanism for doors, a casing, a vertically sliding bar therein, a bell crank lever pivoted in the casing and connected with said bar to actuate the same, a bolt connected with said bar, a slide movable laterally in the casing to actuate said bell crank, and a lever pivoted to the casing to move in a horizontal plane and having one end projecting into the casing to actuate said slide, and having its opposite end projec ing outside of the casing and to one side of the same; substantially as described.

in emergency bolt mechanism for doors, a casing, an operating lever pivoted to the casing and having a handle portion project- 1T0 outsi'lc of the casing and an arm proj J ting within the casing, a sliding member with which said arm contacts, bell crank levers mounted in said casing and simultaneously operative by contact with said sliding member, vertically sliding bars connected to the respective bell crank levers, and bolts connected to the respective bars; substantially as described.

ln witness whereof, l have hereunto set my hand on the 6th day of July, 1911.

z-LBERCT 21. PAGE.

li itnesses Ear/mourn M. I'IORAN, lrlowann J. FLETCHER.

tlopies of this patent may be obtained for five cents each, by addressing the commissioner of Patents, Washington, 13. (3. 

